CN109895418A - A kind of processing method of abnormity hollow structure composite material parts molding core model - Google Patents
A kind of processing method of abnormity hollow structure composite material parts molding core model Download PDFInfo
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Abstract
The present invention relates to resin base fiber reinforced composite material prepreg autoclave molding technical fields, more particularly to a kind of processing method of special-shaped hollow structure composite material parts molding core model, it uses mandrel molding mold, there is molding space on mandrel molding mold, molding space is for forming mandrel molding, the wall surface of molding space is molded surface, comprising the following steps: will be on soft mode blank laying to molded surface；It pressurizes to soft mode blank and mandrel molding mold, is in close contact soft mode blank and mandrel molding mold；Solidify soft mode blank, forms soft mode；Water-soluble material is poured into soft mode, until soft mode inner cavity is completely filled；Solidify water-soluble material；Demoulding.The molding core mold that the above processing method provided through the invention obtains has that the processing is simple, is convenient in demoulding, the advantages of cost is relatively low.
Description
Technical field
The present invention relates to resin base fiber reinforced composite material prepreg autoclave molding technical fields, especially a kind of
The processing method of special-shaped hollow structure composite material parts molding core model.
Background technique
Composite material flies due to the features such as its light weight, specific strength and specific stiffness are high, designability is strong in aerospace
Row device structural member field using increasingly extensive；But the manufacture of the hollow rotary structure composite material parts of abnormity is always
Problem, such as the aero-engine air intake duct of S-shaped variable cross-section；The type constitutional detail generally selects surface quality and essence when forming
Demanding one side is spent as the face being bonded with mold, abbreviation mold face.When the interior shape face of part is mold face, can be selected
Formpiston laying and forming method, the demoulding after part solidifies are more difficult；When External Shape face is mold face, group can be selected
Box-like former, then cannot be straight when no material prepreg laying space but if part section is small in order to subsequent demoulding
Connect laying and molding on former, it is necessary to part is taken off from formpiston and is transferred on former in formpiston upper berth poststack solidifies,
Uncured part blank demoulds more difficult from formpiston at this time.To achieve the purpose that smooth forming part, it is necessary to design
A kind of easily demoulding molding core model；The molding core model mode usually used at present is as follows:
1) metallic combination formula forms core model, and molding core model assembly relation is more, and mating surface precision is high, and difficulty of processing is big, cost
Height, and not can guarantee the whole air-tightness of mold, easily occur the problems such as vacuum leak in the curing process；When shape is more multiple
When miscellaneous, the processing of metallic combination formula pattern be cannot achieve；
2) water-soluble molding core model: water solubility molding core model is divided into two kinds, and one kind is that pouring type forms core model, i.e., in type
Molding core model is obtained after pouring special water-soluble material material solidification in chamber, such molding core model internal soundness and external mass
It is required that it is high, it is unable to hole, material expensive, forming core mould manufacturing cost height；Another kind molding core model in type chamber by pouring
At cube or cylindrical body, then by numerical control processing mode obtain molding core model face, such molding core model internal soundness and
External mass requires height, is unable to hole, and require material machinable, same material expensive, and forming core mould manufacturing cost is high；
Water solubility molding core model could be simply possible to use in male mould forming by water-soluble removal only after part is fully cured,
Be not suitable for external surface surface quality and the high variable cross-section hollow rotary structure composite material parts of abnormity of required precision at
Type.
Summary of the invention
Goal of the invention of the invention is: for adding for special-shaped hollow structure composite material parts of the existing technology
The problem that during work, mold cost is high, demoulding is difficult provides a kind of special-shaped hollow structure composite material parts molding core model
Processing method, this processing method can be used in processing a kind of molding core model of easily demoulding composite material parts.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of processing method of abnormity hollow structure composite material parts molding core model, it is described using mandrel molding mold
There is molding space, for forming mandrel molding, the wall surface of the molding space is the molding space on mandrel molding mold
Molded surface, comprising the following steps: will be on soft mode blank laying to the molded surface；To soft mode blank and mandrel molding mould
Tool pressurizes, and is in close contact soft mode blank and mandrel molding mold；Solidify the soft mode blank, forms soft mode；To soft mode
In pour water-soluble material, until soft mode inner cavity is completely filled；Solidify the water-soluble material；Demoulding.
The above processing method provided through the invention can process a kind of outer surface and be soft mode, be filled in inner cavity
The molding core model of water-soluble material, when carrying out the processing of special-shaped hollow structure composite material parts by this molding core model,
The surface laying carbon fibre composite layer of the molding core model, to composite layer solidification after, by water wash away removal it is water-soluble
Property molding core model, be then deformed soft mode, demoulding can be realized.The molding core mold obtained by this processing method
Have that the processing is simple, is convenient in demoulding, the advantages of cost is relatively low.
As a preferred solution of the present invention, the mandrel molding mold include the first die body and the second die body, described first
Die body and second die body are detachably connected, and first die body and second die body form institute in connected state
State molding space；After the completion of the demoulding step, the processing method is further comprising the steps of: repairing and cuts soft mode in the first mould
The overlap formed at body and the second die body molding.Mandrel molding mold provided by the invention is set as above-mentioned structure, is processing
It, can be convenient for the separation of molding core model and mandrel molding mold during the molding core model.
As a preferred solution of the present invention, the soft mode blank includes outer rubber layer, the carbon fibre initial rinse bed of material and interior rubber
Layer；When by soft mode blank laying to the molded surface, first laying outer rubber layer repaves the folded carbon fibre initial rinse bed of material, most
Laying inner rubber layer afterwards；Above-mentioned steps carry out respectively on the first die body and the second die body, right after the completion of soft mode blank laying
First die body and the second die body are molded.By above-mentioned structure, the carbon fibre initial rinse bed of material is used to play the role of sizing,
Guarantee soft mode under the effect of external force, the deflection of profile can control in appropriate range.Rubber layer setting and carbon fiber
On the outside of prepreg, for protecting the carbon fibre initial rinse bed of material, the carbon fibre initial rinse bed of material is avoided thoroughly to be broken.
As a preferred solution of the present invention, the laying thickness of the carbon fibre initial rinse bed of material is not more than two layers of prepreg, often
The thickness of layer prepreg is no more than 0.25mm.The thickness of the carbon fibre initial rinse bed of material to soft mode in this way, can either provide certain
Styling, and enable to the shape of soft mode that can change, so that the process of the demoulding in composite material parts
In, soft mode can be taken out and deforming soft mode.
As a preferred solution of the present invention, solidifying the soft mode blank, when forming soft mode, by soft mode blank and core model
Molding die is integrally sent into autoclave, and vacuum, pressure are applied, and is warming up to needed for the vulcanization of rubber and carbon fiber prepreg solidification
Temperature.
As a preferred solution of the present invention, in molding, the soft mode blank at molding is made to generate overlap joint.Make the first die body
Overlap joint is generated with the soft mode blank at the second die body molding, can guarantee quality of the soft mode at molding.
As a preferred solution of the present invention, to soft mode blank and mandrel molding mold under pressure: in soft mode base
The outside of the first die body and the second die body after material, molding is successively arranged with hole isolation film, airfelt and vacuum bag, by close
Seal strip seals the vacuum bag, forms vacuum system, vacuumizes to the vacuum system；After the completion of pressurization, dismounting has hole isolation
Film, airfelt, vacuum bag and sealing joint strip.By aforesaid operations, soft mode blank can be allowed sufficiently to paste with mandrel molding mold
It closes, to guarantee soft mode blank surface quality after molding, so that composite material parts inner surface matter with higher
Amount.
As a preferred solution of the present invention, solidifying the soft mode blank, formed in soft mode, after soft mode blank, molding
The first die body and the outside of the second die body be successively arranged non-porous release film, airfelt and vacuum bag, sealed by sealing joint strip
The vacuum bag is evacuated to vacuum degree not less than -0.9bar.
As a preferred solution of the present invention, the both ends of the molding space all have opening, and the mandrel molding mold is also
Including sealing plate, for the sealing plate for being connected with the open edge, the sealing plate is equipped with through-hole；The molding core model includes
Support rod, the support rod are adapted to the opening；Before being poured water-soluble material into soft mode, it is fitted into a sealing plate,
It is inserted into support rod in the through hole of the sealing plate, described support rod one end is located in the water-soluble molding core model, other end position
In outside the molding space, gap between gap, sealing plate and the second die body between sealing plate and the first die body, sealing plate are sealed
Gap between support rod；Water-soluble material is being poured into soft mode, until installation is another after soft mode inner cavity is completely filled
One sealing plate is inserted into support rod in the through hole of the sealing plate, and described support rod one end is located in the water-soluble core, separately
One end is located at outside the molding space, seals the seam between gap, sealing plate and the second die body between sealing plate and the first die body
Gap between gap, sealing plate and support rod.Meanwhile support rod is arranged on molding core model by setting, so that in following process
During composite material parts, the molding core model can be fixed by support rod, to will not influence the table of molding core model
Face is convenient for laying operation.
As a preferred solution of the present invention, when solidifying the water-soluble material, by mandrel molding mold, soft mode blank
It is integrally placed in baking oven, heats up with water-soluble material, solidify water-soluble material.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
The above processing method provided through the invention can process a kind of outer surface and be soft mode, be filled in inner cavity
The molding core model of water-soluble material, when carrying out the processing of special-shaped hollow structure composite material parts by this molding core model,
The surface laying carbon fibre composite layer of the molding core model, to composite layer solidification after, by water wash away removal it is water-soluble
Property molding core model, be then deformed soft mode, demoulding can be realized.The molding core mold obtained by this processing method
Have that the processing is simple, is convenient in demoulding, the advantages of cost is relatively low.
Detailed description of the invention
Fig. 1 is a kind of structural representation of variable cross-section abnormity hollow structure composite material parts provided in an embodiment of the present invention
Figure.
Fig. 2 is the structural schematic diagram of mandrel molding mold provided in an embodiment of the present invention.
Fig. 3 is structural schematic diagram when mandrel molding mold provided in an embodiment of the present invention removes sealing plate.
Fig. 4 is to carry out structural schematic diagram when step S3 in processing method provided in an embodiment of the present invention.
Fig. 5 is the partial enlarged view in the portion I in Fig. 4.
Fig. 6 is to carry out structural schematic diagram when step S4 in processing method provided in an embodiment of the present invention.
Fig. 7 is the structural schematic diagram in processing method provided in an embodiment of the present invention, after the completion of step S6.
Fig. 8 is the structural schematic diagram for the molding core model that the processing method provided through the embodiment of the present invention obtains.
Fig. 9 is the cross-sectional view for the molding core model that the processing method provided through the embodiment of the present invention obtains.
Figure 10 is the schematic diagram that the pre-compacted in processing instance (one), when carrying out step A3 operates.
Figure 11 is II in Figure 10 partial enlarged view.
Figure 12 is to carry out schematic diagram when step A4 in processing instance (one).
Figure 13 is III in Figure 12 partial enlarged view.
Figure 14 is the structural schematic diagram for the shaping female mold used in processing instance (two).
Figure 15 is to carry out structural schematic diagram when step B3 in processing instance (two).
Figure 16 is to carry out structural schematic diagram when step B6 in processing instance (two).
Icon: 1- composite material parts；2- mandrel molding mold；The first die body of 21-；The second die body of 22-；23- sealing plate；
4- has hole isolation film；5- airfelt；6- vacuum bag；7- non-porous release film；8- sealing joint strip；3- forms core model；31- soft mode；
32- water solubility core；33- support rod；9- shaping female mold；The first former die body of 91-；The second former die body of 92-.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments,
The present invention will be described in further detail.It should be appreciated that described herein, specific examples are only used to explain the present invention,
It is not intended to limit the present invention.
Embodiment
Please refer to Fig. 1-Fig. 9.The embodiment of the invention provides a kind of hollow rotary structure composite materials of variable cross-section abnormity
The processing method of the molding core model 3 of part 1.Fig. 8 and Fig. 9 is please referred to, this processing method can obtain a kind of molding core model 3.This
Kind molding core model 3 can be used in processing the hollow rotary structure composite material parts 1 of variable cross-section abnormity as shown in Figure 1.
Please refer to figs. 2 and 3, processing method provided in an embodiment of the present invention use mandrel molding mold 2, the core model at
Pattern tool 2 includes the first die body 21, the second die body 22 and sealing plate 23.First die body 21 and the second die body 22 are detachably connected.
When first die body 21 is connected with the second die body 22, it is capable of forming molding space, the shape of molding space is used for and the composite material
The outer surface of part 1 is adapted to.The both ends of molding space are equipped with opening, and the opening is for being in communication with the outside.The table of molding space
Face is molded surface.
Wherein, in the present embodiment, the first die body 21 is detachably connected with the second die body 22 by screw realization.
The quantity of sealing plate 23 is two, and one of sealing plate 23 is used to be connected with the opening of molding space one end, another
Sealing plate 23 with the opening of the molding space other end for being connected.Sealing plate 23 is equipped with through-hole.
Processing method provided in an embodiment of the present invention the following steps are included:
It S1. will be on 31 blank laying to the molded surface of soft mode；
Wherein, 31 blank of soft mode includes outer rubber layer, the carbon fibre initial rinse bed of material and inner rubber layer.During laying,
Outer rubber layer, the carbon fibre initial rinse bed of material and inner rubber layer are successively laid on the molded surface on the first die body 21, in the second mould
Outer rubber layer, the carbon fibre initial rinse bed of material and inner rubber layer are successively laid on the molded surface of body 22.
Further, in the present embodiment, the solidification temperature of the carbon fibre initial rinse bed of material and outer rubber layer and inner rubber layer
Curing temperature is close, so that the carbon fibre initial rinse bed of material can sufficiently solidify during cured later, rubber layer being capable of abundant sulphur
Change.
Further, in the present embodiment, the carbon fibre initial rinse bed of material is carbon fibre fabric prepreg.Outer rubber layer and
The rubber material that inner rubber layer selects heatproof to be more than or equal to 250 DEG C, sulfurizing temperature range are 176 ± 5 DEG C.
Wherein, the thickness of two layers of the laying layer number of carbon fiber prepreg, the single layer carbon fibre initial rinse bed of material is no more than
0.25mm.The laying direction of two layers of carbon fibre fabric prepreg is consistent, and to guarantee the symmetry of laying, avoids carbon fiber
Dimension prepreg deforms after hardening.
S2. die closing operation is carried out to the first die body 21 and the second die body 22；
Wherein, at molding, produce 31 blank of soft mode on 31 blank of soft mode and the second die body 22 on the first die body 21
Raw overlap joint, to increase intensity of the soft mode 31 at molding.
Please refer to Fig. 4 and Fig. 5:
S3. it pressurizes to 31 blank of soft mode and mandrel molding mold 2, keeps 31 blank of soft mode and mandrel molding mold 2 tight
Contiguity touching；
Wherein, the outside of the first die body 21 after 31 blank of soft mode, molding and the second die body 22 be successively arranged with hole every
From film 4, airfelt 5 and vacuum bag 6, the vacuum bag 6 is sealed by sealing joint strip 8, vacuum system is formed, to the vacuum system
System vacuumizes, to generate pressure, is in close contact 31 blank of soft mode and the first die body 21 and the second die body 22.
After the completion of pressurization, removal has hole isolation film 4, airfelt 5 and vacuum bag 6.
Please refer to Fig. 6 and Fig. 7:
S4. solidify 31 blank of soft mode, form soft mode 31；
Wherein, the outside of the first die body 21 after 31 blank of soft mode, molding and the second die body 22 be successively arranged it is non-porous every
From film 7, airfelt 5 and vacuum bag 6, the vacuum bag 6 is sealed by sealing joint strip 8, be evacuated to vacuum degree not less than-
0.9bar applies in 31 blank of soft mode and the whole feeding autoclave of mandrel molding mold 2 vacuum, pressure, is warming up to rubber
Vulcanization and the carbon fibre initial rinse bed of material solidify required temperature；
After the completion of solidification, removal non-porous release film 7, airfelt 5 and vacuum bag 6.
S5. it is fitted into a sealing plate 23, is inserted into support rod 33 in the through hole of sealing plate 23,33 one end of support rod is located at
In the molding space, the other end is located at outside the molding space, seals the gap between sealing plate 23 and the first die body 21, seals
Gap, sealing plate 23 between plate 23 and the second die body 22 and the gap between support rod 33；
Wherein, by sealing joint strip 8 to being sealed at each gap.
S6. water-soluble material is poured into soft mode 31, until 31 inner cavity of soft mode is completely filled.
Water-soluble material in the present embodiment refers to, the material that can be removed under the souring of water flow.In this reality
It applies in example, it is preferred to use water-soluble material resistant to high temperature, such as: polyvinyl alcohol (PVAL) aqueous solution and polyvinylpyrrolidone
(PVP) mixed solution of aqueous solution is as basis material, using quartz sand or glass microballoon as the water-soluble material of reinforcing material.
Wherein the mixed solution of polyvinyl alcohol (PVAL) aqueous solution and polyvinylpyrrolidone (PVP) aqueous solution is as adhesive, the glue
Stick is water-soluble.After adhesive meets water dissolution, quartz sand or glass microballoon will be defeated and dispersed, to make water-soluble core
It is removed.
S7., another sealing plate 23 is installed, is inserted into support rod 33 in the through hole of sealing plate 23,33 one end of support rod is located at water
In soluble materials, the other end is located at outside molding space, seals gap between sealing plate 23 and the first die body 21, sealing plate 23 and the
Gap, sealing plate 23 between two die bodys 22 and the gap between support rod 33.
S8. solidify the water-soluble material；
Wherein, mandrel molding mold 2,31 blank of soft mode and water-soluble material are integrally placed in baking oven, are heated up,
Solidify water-soluble material.
S9. it demoulds.
Sealing plate 23 is removed, separates the first die body 21 with the second die body 22.
S10. the overlap for cutting soft mode 31 at molding is repaired.
The molding core model 3 that the above-mentioned processing method provided through the embodiment of the present invention obtains includes soft mode 31, Water-Soluble Core
Portion 32 and support rod 33.
Wherein, soft mode 31 includes the outer rubber layer and inner rubber layer of vulcanization, is carbon between outer rubber layer and inner rubber layer
Fiber composite layer.The water solubility core 32 made of water-soluble material is filled in the space that soft mode 31 surrounds.
The quantity of support rod 33 is two, and one of support rod 33 is located at one end of water-soluble core 32, another branch
Strut 33 is located at the other end of water-soluble core 32.33 one end of support rod is inserted into water-soluble core 32, and the other end is located at water
Except dissolubility core 32.
The molding core model 3 obtained by above-mentioned processing method, can either be used for inner mold face surface quality and required precision is high
The hollow rotary structure composite material parts 1 of variable cross-section abnormity processing, and can be used in outer mold surface surface quality and precision
The processing of the hollow rotary structure composite material parts 1 of demanding variable cross-section abnormity.
It is illustrated below by way of two processing instances:
Processing instance (one):
Figure 10-Figure 13 is please referred to, when the change high for inner mold face surface quality and required precision of above-mentioned molding core model 3
When the processing of cross section special-shaped hollow rotary structure composite material parts 1:
A1. the molding core model 3 is fixed by support rod 33；
Wherein, the fixation of molding core model 3 can be realized, so that entire 31 surface of soft mode be made not hidden in clamp standoff bar 33
Gear, is convenient for the paving of composite layer.
A2. in the surface paving band glue release cloth of soft mode 31；
31 surface of soft mode could be covered if necessary to muti-piece release cloth, then is docked between adjacent two pieces of release cloths, without spelling
It connects.That is: the sideline of two pieces of adjacent release cloths is in contact, but two pieces of release cloths do not generate overlapping in a thickness direction.Pass through this
Kind setting influences the surface quality of composite material parts 1 after avoiding release cloth from being overlapped.
A3. in the 31 surface paving material prepreg of soft mode；
Wherein, during paving, a pre-compacted is carried out every preset thickness of composite material.Pre-compacted operation
It is specifically performed such that on the outside of composite layer and is successively equipped with hole isolation film 4, airfelt 5 and vacuum bag 6, seal vacuum bag
6, it is located at molding die and composite material in vacuum bag 6, to form vacuum system, which is vacuumized, by big
The effect of air pressure is compacted composite material.
Further, after laying for the first time and subsequent every three layings, carry out a pre-compacted operation.
A4. solidify the material prepreg；
Wherein, in this way carry out material prepreg solidification: be successively laid on the outside of the composite layer it is non-porous every
From film 7, airfelt 5 and vacuum bag 6, the vacuum bag 6 is sealed, the molding die and composite material is made to be located at the vacuum
In bag 6, to form vacuum system, the vacuum system is integrally placed in autoclave, applies pressure, vacuum, increases temperature.
A5. the water-soluble core 32, separation soft mode 31 and cured composite material are removed；
Wherein, which is rinsed by the water flow of giant, after removing water-soluble core 32, makes soft mode
31 are deformed, separation soft mode 31 and cured composite material.
A6. the composite material after solidification repair and cut processing, obtain required composite material parts 1.
Processing instance (two)
Figure 14-Figure 16 is please referred to, when the change high for outer mold surface surface quality and required precision of above-mentioned molding core model 3
When the processing of cross section special-shaped hollow rotary structure composite material parts 1:
B1. the molding core model 3 is fixed by support rod 33；
Wherein, the fixation of molding core model 3 can be realized, so that entire 31 surface of soft mode be made not hidden in clamp standoff bar 33
Gear, is convenient for the paving of composite layer.
B2. in the surface paving band glue release cloth of soft mode 31；
31 surface of soft mode could be covered if necessary to muti-piece release cloth, then is docked between adjacent two pieces of release cloths, without spelling
It connects.That is: the sideline of two pieces of adjacent release cloths is in contact, but two pieces of release cloths do not generate overlapping in a thickness direction.Pass through this
Kind setting influences the surface quality of composite material parts 1 after avoiding release cloth from being overlapped.
B3. in the 31 surface paving material prepreg of soft mode；
Wherein, during paving, a pre-compacted is carried out every preset thickness of composite material.Pre-compacted operation
It is specifically performed such that on the outside of composite layer and is successively equipped with hole isolation film 4, airfelt 5 and vacuum bag 6, seal vacuum bag
6, it is located at molding die and composite material in vacuum bag 6, to form vacuum system, which is vacuumized, by big
The effect of air pressure is compacted composite material.
Further, after laying for the first time and subsequent every three layings, carry out a pre-compacted operation.
After the completion of pre-compacted operation, removal has hole isolation film 4, airfelt 5 and vacuum bag 6.
B4. sealing joint strip 8 is arranged in the region of non-mulching composite prepreg on 31 surface of soft mode, on soft mode 31
Covering vacuum bag 6 makes sealing joint strip 8, vacuum bag 6 and soft mode 31 form a sealing system, and material prepreg is located at should
In sealing system.
B5. the water-soluble core 32 is removed.
Wherein it is possible to wash off water-soluble core 32 by giant.After removing water-soluble core 32, wipe soft
31 inner surface of mould.
B6. soft mode 31, material prepreg are placed in shaping female mold 9, solidify material prepreg；
Wherein, when solidifying material prepreg, it is successively laid with non-porous release film 7 on the outside of composite layer, breathes freely
Felt 5 and vacuum bag 6 seal the vacuum bag 6, and molding core model 3, shaping female mold 9 and composite material is made to be located at the vacuum bag 6
In, to form vacuum system, vacuum system is integrally placed in autoclave, applies pressure, vacuum, increases temperature.
B7. the first former die body 91 and the second former die body 92 are dismantled, soft mode 31 is removed；
B8. it polishes on composite material parts 1, at 92 molding of the first former die body 91 and the second former die body
Glue rib, repairs and cuts shape, composite material parts 1 required for obtaining.
The processing method of the hollow rotary structure composite material parts 1 of variable cross-section abnormity provided by the invention has following
The utility model has the advantages that
1. the above processing method provided through the invention, a kind of outer surface can be processed and be soft mode 31, fill out in inner cavity
Molding core model 3 filled with water-soluble material carries out adding for special-shaped hollow structure composite material parts 1 by this molding core model 3
Working hour passes through washing away for water after composite layer solidification in the surface laying carbon fibre composite layer of the molding core model 3
The water-soluble molding core model 3 of removal, is then deformed soft mode 31, demoulding can be realized.It is obtained by this processing method
Core model 3 has the advantages that the processing is simple, is convenient in demoulding, cost is relatively low for molding.
2. in processing method provided in an embodiment of the present invention, including carbon fibre composite layer in soft mode 31, capable of giving
Soft mode 31 provides certain style-ability, and soft mode 31 is avoided to generate excessively big deformation, while the carbon fiber being laid with further through control
The thickness for tieing up composite layer, allows the shape of soft mode 31 to change, consequently facilitating demoulding；
3. in processing method provided by the invention, carbon fibre composite layer is set between inner rubber layer and outer rubber layer,
Carbon fibre composite layer can be formed by inner rubber layer and outer rubber layer and be protected, so that even if carbon fibre composite
Local damage has occurred in layer, and the thorough fracture of soft mode 31 will not be caused due to the local damage.
It should be noted that simply showing a kind of possible feelings of 1 structure of composite material parts in attached drawing of the invention
Shape.Processing method provided by the invention can also be used to the processing of the molding core model 3 of other different structures, be not limited solely to attached
A kind of situation shown in figure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of processing method of abnormity hollow structure composite material parts molding core model, which is characterized in that use mandrel molding
Mold, has molding space on the mandrel molding mold, and the molding space is used to form the molding of core model, the molding sky
Between wall surface be molded surface, comprising the following steps:
It will be on soft mode blank laying to the molded surface；
It pressurizes to soft mode blank and mandrel molding mold, is in close contact soft mode blank and mandrel molding mold；
Solidify the soft mode blank, forms soft mode；
Water-soluble material is poured into soft mode, until soft mode inner cavity is completely filled；
Solidify the water-soluble material；
Demoulding.
2. processing method according to claim 1, which is characterized in that the mandrel molding mold includes the first die body and the
Two die bodys, first die body and second die body are detachably connected, and first die body and second die body are even
It connects and forms the molding space under state；
After the completion of the demoulding step, the processing method is further comprising the steps of:
It repairs and cuts the overlap that soft mode is formed at the first die body and the second die body molding.
3. processing method according to claim 2, which is characterized in that the soft mode blank includes outer rubber layer, carbon fiber
Prepreg and inner rubber layer；
When by soft mode blank laying to the molded surface, first laying outer rubber layer repaves the folded carbon fibre initial rinse bed of material, most
Laying inner rubber layer afterwards；
Above-mentioned steps carry out respectively on the first die body and the second die body, after the completion of soft mode blank laying, to the first die body and
Two die bodys are molded.
4. processing method according to claim 3, which is characterized in that the laying thickness of the carbon fibre initial rinse bed of material is little
It is no more than 0.25mm in the thickness of two layers of prepreg, every layer of prepreg.
5. processing method according to claim 3, which is characterized in that solidifying the soft mode blank, it, will when forming soft mode
Soft mode blank and mandrel molding mold are integrally sent into autoclave, are applied vacuum, pressure, are warming up to the vulcanization of rubber and carbon fiber is pre-
Leaching material solidification required temperature.
6. processing method according to claim 3, which is characterized in that in molding, generate the soft mode blank at molding
Overlap joint.
7. processing method according to claim 6, which is characterized in that whole to soft mode blank and the progress of mandrel molding mold
When body vacuumizes pre-compacted:
The outside of the first die body and the second die body after soft mode blank, molding is successively arranged with hole isolation film, airfelt and true
Empty bag seals the vacuum bag by sealing joint strip, forms vacuum system, vacuumize to the vacuum system；
After the completion of vacuumizing pre-compacted, dismounting has hole isolation film, airfelt, vacuum bag and sealing joint strip.
8. processing method according to claim 7, which is characterized in that solidifying the soft mode blank, is being formed in soft mode,
The outside of the first die body and the second die body after soft mode blank, molding is successively arranged non-porous release film, airfelt and vacuum bag, leads to
It crosses sealing joint strip and seals the vacuum bag, be evacuated to vacuum degree not less than -0.9bar.
9. processing method according to claim 1, which is characterized in that the both ends of the molding space all have opening, institute
Stating mandrel molding mold further includes sealing plate, and for the sealing plate for being connected with the open edge, the sealing plate is equipped with through-hole；
The molding core model includes support rod, and the support rod is adapted to the opening；
Before being poured water-soluble material into soft mode, it is fitted into a sealing plate, is inserted into support rod in the through hole of the sealing plate,
Described support rod one end is located in the molding space, and the other end is located at outside the molding space, seals sealing plate and the first die body
Between gap, the gap between sealing plate and the second die body, the gap between sealing plate and support rod；
Water-soluble material is being poured into soft mode, until another sealing plate is installed, in the envelope after soft mode inner cavity is completely filled
Support rod is inserted into the through hole of plate, and described support rod one end is located in the water-soluble material, and it is empty that the other end is located at the molding
Between it is outer, seal between gap, sealing plate and the support rod between gap, sealing plate and the second die body between sealing plate and the first die body
Gap.
10. processing method according to claim 9, which is characterized in that when solidifying the water-soluble material, by core model at
Pattern tool, soft mode blank and water-soluble material are integrally placed in baking oven, are heated up, are made water-soluble material baking and curing.
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